43 results about "Hydrogen peroxide breakdown" patented technology

The invention provides a hybrid power system for a dual-mode patrolling bomb and a use mode of the hybrid power system, and belongs to the technical field of aviation power. The problem that an existing patrolling bomb power system is difficult to meet the requirements for long-time cruising and instantaneous explosion acceleration at the same time is solved. The system comprises a hydrogen supply mechanism, a hydrogen peroxide supply mechanism, a fuel cell, a motor and a combustion chamber, the hydrogen supply mechanism is connected with an anode of the fuel cell, the fuel cell is connected with the motor, the motor is connected with a propeller, and the hydrogen peroxide supply mechanism is provided with two supply lines. The first supply line is connected with a cathode of the fuel cell through the hydrogen peroxide decomposition unit, the second supply line is connected with the combustion chamber, a first flow regulating valve is arranged on the first supply line, a second flow regulating valve is arranged on the second supply line, a grain is arranged in the combustion chamber, and the grain is spontaneous combustion fuel with a metal framework. The combustion chamber is connected with the exhaust nozzle. The hybrid power device is mainly used for providing hybrid power for the dual-mode patrol ammunition.

The invention discloses a method for efficiently producing pyridoxal phosphate based on a three-enzyme cascade reaction and a recombinant strain, and belongs to the technical field of biological engineering. The recombinant escherichia coli for co-expressing the pyridoxine phosphate phosphatase mutant, the pyridoxine phosphate oxidase and the hydrogen peroxide decomposing enzyme is constructed, three-enzyme synergy is realized by optimizing the copy number of a carrier, and the catalytic efficiency of a recombinant strain as a cell catalyst is improved. The invention further provides a one-pot method for preparing pyridoxal phosphate, the production cost is reduced, an efficient, green and economical biosynthesis path is provided for industrial production of PLP, and the method can be widely applied to the fields of food, medicine and the like and has important industrial value and application prospects.

The utility model relates to the technical field of advanced treatment of landfill leachate, and discloses an ultraviolet-hydrogen peroxide oxygen-based advanced treatment mechanism for landfill leachate, which comprises a reaction barrel, a water inlet pipe is fixedly connected to the side wall of the reaction barrel, a top cover is arranged on the upper surface of the reaction barrel, an output pipe is fixedly connected to the side wall of the reaction barrel, and a water outlet pipe is arranged on the side wall of the reaction barrel. A settling box is arranged on the side wall of the output pipe, a filtering box is arranged on the side wall of the settling box, an activated carbon plate is arranged in the filtering box, a water outlet pipe is fixedly connected to the side wall of the filtering box, a deep treatment mechanism is arranged on the side wall of the reaction barrel, and a fixing assembly is arranged on the side wall of the activated carbon plate. According to the device, the ultraviolet lamp is started for irradiation, meanwhile, hydrogen peroxide is conveyed into the reaction barrel through the metering pump, under irradiation of ultraviolet light, the hydrogen peroxide is decomposed to generate hydroxyl free radicals, landfill leachate is gradually degraded into small molecular substances, and through the structure, the treatment capacity of the device is improved, and the operation cost is reduced.

The invention provides a diagnosis and treatment integrated nano platform as well as a preparation method and application thereof. According to the diagnosis and treatment integrated nano platform, an organic-inorganic nano hybrid is constructed through structure optimization and function integration, four modes of PTT, PDT, SDT and CDT are organically combined innovatively, and efficient synergistic treatment of GBM is achieved through real-time monitoring of photoacoustic imaging. First, a dOMV encapsulation strategy significantly improves the ability to penetrate through the blood brain barrier. Meanwhile, the IEICO-4F has a strong near-infrared absorption characteristic and has a synergistic effect with the high catalytic activity of the mesoporous platinum nanoparticles. Under the laser / ultrasonic excitation condition, the diagnosis and treatment integrated nano platform shows excellent photo-thermal conversion performance, the Fenton reaction rate can be increased, endogenous hydrogen peroxide can be continuously catalyzed to be decomposed to generate oxygen, and the tumor hypoxia state is effectively relieved. The series of reactions further enhance the generation of ROS, activate a Caspase-1 / GSDMD mediated pyroptosis pathway, finally achieve an efficient tumor inhibition effect, and successfully break through the limitation of a single treatment mode.

This invention provides a collagen biphase crosslinked material, its preparation method, and an implantable scaffold. It relates to compositions of polymeric compounds and also to the field of medical materials technology. This application provides a method for preparing a collagen biphase crosslinked material. During the nucleation phase, a low concentration of hydrogen peroxide is introduced to synergistically promote collagen self-assembly and hydrogen peroxide crosslinking. During the growth phase, a higher concentration of hydrogen peroxide solution is added to allow the covalent crosslinked network to form synchronously with fiber extension. The growth phase self-assembly control process can significantly extend the collagen self-assembly time, resulting in more thorough crosslinking and achieving structure-function synergy at the molecular scale. Finally, hydrogen peroxide decomposes into water and oxygen, leaving no crosslinking agent residue. The prepared collagen biphase crosslinked material exhibits good mechanical properties and resistance to enzymatic degradation, and the complete in vivo degradation time can be controlled between 12 and 24 months.

The invention belongs to the technical field of bacterial detection, and provides a nano-composite probe system, application thereof and a single-channel micro-fluidic chip for detecting the number of bacteria and the drug resistance level of the bacteria, and the nano-composite probe system comprises a phage embedded magnetic bead probe and an AIE (at) Ag (at) MnO2NFs composite probe. The Ag-MnO2 nanoflower surface modified AIE (Raman reporter molecule) composite probe can realize a strong Raman signal, Ag-coated MnO2 catalyzes decomposition of hydrogen peroxide to push a red dye to move so as to realize a distance signal, and magnetic bead-bacteriophage is used as a recognition element of target bacteria and realizes magnetic separation and enrichment at the same time. Based on high specificity and good environmental tolerance of the phage, the Ag-MnO2 nanoflowers enhance Raman signals of AIE Raman reporter molecules, dual-mode signal internal correction realizes the stability of the sensor and the interference resistance to factors such as environment and experiments, and the specificity of a detection strategy and the accuracy of on-site analysis are improved.

The invention relates to a preparation method and application of high-temperature-resistant inorganic modified bentonite. The method comprises the following steps: firstly, treating bentonite and sepiolite composite clay through a microwave-assisted hydrogen peroxide method, and improving the dispersity of minerals by utilizing a large amount of oxygen generated by decomposing hydrogen peroxide in a microwave field; then metal oxide nanoparticles are added into the suspension of the composite clay mineral, and sepiolite and metal oxide are used for synergistically modifying bentonite, so that the high-temperature tolerance of the material at 250 DEG C is improved, and the material can be used as a slurry making agent in water-based drilling fluid. No organic reagent is used, and related products have good thermal stability.

The invention discloses a method for simultaneously degrading organic wastewater and reducing precious metals, and belongs to the technical field of sewage treatment and metal recovery. The invention provides a novel laser-driven electrochemical battery aiming at the defects of the traditional technology in the field of synchronous degradation of organic wastewater and reduction of noble metal ions. According to the cell, titanium serves as an anode, platinum serves as a cathode, electron migration is driven through the potential difference between the two electrodes, and electrochemical reduction of silver ions is achieved. And meanwhile, laser is adopted to irradiate the anode to excite and form plasma, so that water and hydrogen peroxide are decomposed to generate hydroxyl radicals to efficiently degrade MB. In addition, the laser also has the capabilities of directly photolyzing MB and enhancing the electrochemical activity of the cell to synergistically promote the rapid reduction of Ag (I). The invention provides an efficient and green new way for organic wastewater treatment and precious metal resource utilization.

The invention is applicable to the technical field of titanium alloy surface treatment, and provides a titanium alloy nitric-acid-free chemical polishing solution and a preparation method thereof, and every 1L of the polishing solution comprises the following components: 100-150g of ammonium bifluoride, 150-250g of hydrogen peroxide with the concentration of 50%, 200-350g of phosphoric acid with the concentration of 85%, 60-120g of modified ethylene glycol, 10-20g of a compound stabilizer, 5-10g of a modified corrosion inhibitor and the balance of water. The modified ethylene glycol is ethylene glycol modified by a silane coupling agent KH550, and the modified corrosion inhibitor is a modified product of thiourea grafted maleic anhydride; through raw material modification and component synergy, the titanium alloy surface treatment effect can be improved, generation of nitric oxide toxic gas can be completely eradicated, decomposition of hydrogen peroxide and excessive corrosion of titanium alloy are avoided, and the polishing solution is suitable for efficient and environment-friendly polishing of titanium alloy parts in complex shapes.

The invention relates to the field of hydrogen peroxide production, in particular to a hydrogen peroxide decomposition inhibition device for hydrogen peroxide production, which comprises a tank body, the device further comprises a feeding pipe; a cooling cavity is formed in the tank body; the tank body is communicated with a feeding pipe, and the feeding pipe is provided with a feeding valve; the tank body is communicated with a discharge pipe, and the discharge pipe is provided with a discharge valve; the tank body is fixedly connected with a plurality of spring rods I; the telescopic ends of all the spring rods I are jointly and fixedly connected with a cover plate, and the cover plate makes contact with the tank body. The cover plate is fixedly connected with a circular plate, and the circular plate is slidably connected with the interior of the tank body. When the water bag sprays water to dilute the hydrogen peroxide in the leakage area, the electromagnetic valve is controlled to be opened, so that cooling water in the cooling cavity enters the water bag, water in the water bag is cooled, then the hydrogen peroxide in the leakage area is cooled by the cooling water sprayed out of the water bag, and the decomposition rate of the leaked hydrogen peroxide is effectively restrained.

The invention provides a collagen biphasic system cross-linking material, a preparation method thereof and an implantation stent, relates to a high-molecular compound composition, relates to a high-molecular compound composition, and also relates to the technical field of medical materials. According to the preparation method of the collagen two-phase system cross-linking material, in the nucleation period, low-concentration hydrogen peroxide is introduced, so that collagen self-assembly and hydrogen peroxide cross-linking are carried out synergistically; in the growing period, a hydrogen peroxide solution with relatively high concentration is added, so that a covalent cross-linked network and fiber extension are synchronously formed, and a self-assembly regulation process in the growing period can greatly prolong the collagen self-assembly time, so that cross-linking is more thorough, and structure-function synergy on a molecular scale is realized; finally, hydrogen peroxide is decomposed into water and oxygen, no crosslinking agent is left, the prepared collagen biphasic system crosslinking material has good mechanical performance and enzymolysis resistance, and the in-vivo complete degradation time can be controlled within 12-24 months.

To provide a detergent set and a washing method in which bubbles generated after mixing an enzyme with washing treatment water containing hydrogen peroxide are conspicuous.SOLUTION: The detergent set includes an oxidizing agent which is an inorganic peroxide generating hydrogen peroxide in the presence of water, an alkaline agent, an enzyme having catalase activity decomposing hydrogen peroxide into water and oxygen, and an amphoteric surfactant, wherein the oxidizing agent and the enzyme are stored in a non-reactive state.SELECTED DRAWING: Figure 1

The present disclosure relates to a fuel cell including a durability-enhancing layer and a method for manufacturing the same. The fuel cell includes: an electrolyte membrane-electrode assembly; a durability-enhancing layer formed on at least one side of the electrolyte membrane-electrode assembly; and a gas diffusion layer formed on a side of the durability-enhancing layer opposite the side on which the electrolyte membrane-electrode assembly is formed. The durability-enhancing layer includes a hydrogen peroxide decomposition catalyst and a hydrogen ion conductive polymer and is formed on at least a portion of at least one side of the electrolyte membrane-electrode assembly.

The application belongs to the technical field of fine chemical industry, and particularly relates to a continuous flow synthesis method and device of diene diepoxide. The method comprises the following steps: mixing an organic phase containing a diene compound, a catalyst and a pyridine-acetic acid ligand, and an aqueous phase containing hydrogen peroxide and a specific buffer system through a micro-mixer to form a water-in-oil micro-dispersion system; making the micro-dispersion system enter a micro-reactor to perform an epoxidation reaction; then performing cooling treatment on the reaction liquid; removing the aqueous phase through a membrane separator; and obtaining the diene diepoxide through post-treatment. By introducing the buffer system, the pH of the reaction system is stabilized at 10.5-12.0, the decomposition of hydrogen peroxide and the deactivation of methyltrioxorhenium are effectively inhibited; in combination with the continuous flow technology, the reaction process is accurately controlled and intrinsically safe, and the reaction time is significantly shortened; and the conversion rate of the diene compound and the yield of the target epoxide are both significantly improved.

To provide a water treatment apparatus and a water treatment method capable of recovering ammonia contained in ammonia / hydrogen peroxide-containing water, which contains ammonia and hydrogen peroxide while reducing the number of pH adjustment steps and an amount of chemicals used.SOLUTION: A water treatment apparatus 1 includes: a hydrogen peroxide decomposition apparatus 12 that decomposes hydrogen peroxide in ammonia / hydrogen peroxide-containing water containing ammonia and hydrogen peroxide; and a semipermeable membrane treatment device 5 that obtains semipermeable membrane concentrated water by passing hydrogen peroxide decomposition treated water through a first space 20 by using a semipermeable membrane module 16 having the first space 20 and a second space 22 partitioned by a semipermeable membrane 24, and pressurizing the first space 20 to permeate water contained in the hydrogen peroxide decomposition treated water through the semipermeable membrane 24, and obtains semipermeable membrane diluted water by passing a part of the hydrogen peroxide decomposition treated water or at least a part of the semipermeable membrane concentrated water through the second space 22.SELECTED DRAWING: Figure 1

The present invention relates to the field of scramjet technology and addresses the technical issues of scramjet engines, such as the difficulty of wide-area organized combustion and flame stabilization. In particular, it relates to an integrated module for atomized injection cavity for catalytic decomposition of hydrogen peroxide and a method for enhancing injection flame stabilization. The module utilizes a catalytic decomposition module to decompose liquid hydrogen peroxide into high-temperature oxygen and water vapor. The decomposed gas is then mixed with kerosene in a pipeline to form kerosene atomized with the high-temperature oxygen and water vapor. The kerosene is then atomized and injected laterally upstream of the cavity through atomized kerosene nozzles, forming a transverse jet of atomized kerosene within a supersonic combustion chamber, thereby improving combustion efficiency. By forming an oxygen-enriched jet within the supersonic combustion chamber that enhances combustion performance, the present invention can help improve the ignition performance of liquid kerosene, while also reducing the atomized particle size and increasing the jet penetration depth, thereby improving gas mixing efficiency and broadening the range of flame stabilization for supersonic combustion of liquid kerosene.

The invention relates to the technical field of strain preservation, and discloses strain preservation equipment with a disinfection function and a disinfection method.The strain preservation equipment comprises a device frame, a primary filtering part is arranged on the device frame, the primary filtering part comprises a primary filtering cover, three sliding rods are connected to the inner wall of the primary filtering cover in a surrounding mode, each sliding rod is of an L-shaped structure, and the primary filtering cover is provided with a secondary filtering part; a tray is connected to the inner wall of a cover opening in the bottom end of the primary filter cover, the top edge of the inner wall of the tray is of an inclined plane structure, caulking grooves corresponding to the three sliding rods are formed in the top of the outer wall of the tray in a surrounding mode, the bent portions of the three sliding rods are inserted into the inner walls of the three caulking grooves respectively, and a pressing disc is arranged in the primary filter cover; the primary filtering part is adopted to filter and intercept impurities and propagules to reduce the sterilization load, the first sterilization part destroys spore structures and preliminarily kills spores by using high-concentration hydrogen peroxide, and the second sterilization part thoroughly inactivates residual spores through high-temperature and high-pressure steam, and accelerates decomposition of hydrogen peroxide at high temperature to avoid chemical residues.

Systems and methods for purifying aqueous solutions include a hydrogen peroxide removal unit including a hydrogen peroxide decomposition media arranged to receive un-treated aqueous solution. The hydrogen peroxide decomposition media includes a platinum group catalyst that includes beads with a density of at least 1 gram / milliliter (g / ml).

The application belongs to the technical field of space environment disinfection, and provides a self-supporting multi-component composite nano catalyst for decomposing and vaporizing hydrogen peroxide and a preparation method thereof. The composite nano catalyst is an AlCrFePt / NF quaternary composite nano catalyst, which comprises a catalyst active component and a catalyst active component carrier. The catalyst active component is composed of Al, Fe, Cr and Pt, the catalyst active component carrier is foam nickel, and the catalyst active component is uniformly loaded on the surface of the catalyst active component carrier base. The composite nano catalyst can efficiently decompose hydrogen peroxide into water and oxygen, and has good stability. The preparation method is a one-pot hydrothermal method, which does not require special instruments and equipment, is simple in process, cost-saving, easy to operate, and suitable for large-scale production. The problems of high cost and low catalytic efficiency of the catalyst for decomposing and vaporizing hydrogen peroxide are solved.

Provided are a water treatment device and a water treatment method that make it possible to recover ammonia contained in ammonia / hydrogen peroxide-containing water, which contains ammonia and hydrogen peroxide, while reducing the number of pH adjustment steps and the amount of chemicals used. A water treatment device (1) comprises: a hydrogen peroxide decomposition device (12) that decomposes hydrogen peroxide in ammonia / hydrogen peroxide-containing water, which contains ammonia and hydrogen peroxide; and a semipermeable membrane treatment device (5) that uses a semipermeable membrane module (16) having a first space (20) and a second space (22) partitioned by a semipermeable membrane (24) to obtain semipermeable membrane-concentrated water by passing the hydrogen peroxide decomposition-treated water through the first space (20) and causing water contained in the hydrogen peroxide decomposition-treated water to permeate through the semipermeable membrane (24) with the first space (20) pressurized, and obtain semipermeable membrane-diluted water by passing a portion of the hydrogen peroxide decomposition-treated water or at least a portion of the semipermeable membrane-concentrated water through the second space (22).

The invention discloses a choline dehydrogenase analysis sensing method based on a tetrahedral programmable artificial enzyme and application of the choline dehydrogenase analysis sensing method in gastric cancer. According to the sensor, a Poly-A tetrahedral gold cluster is used as a catalyst, hydrogen peroxide (H2O2) is effectively promoted to be decomposed to generate hydroxyl free radicals (. OH), the free radicals oxidize o-phenylenediamine (OPD) from a colorless state to yellow oxOPD, and a fluorescence emission peak at the wavelength of 563 nm and an ultraviolet absorption peak at the wavelength of 420 nm are remarkably enhanced. Furthermore, H2O2 is generated through an enzyme reaction channel constructed by choline (Ch) and choline dehydrogenase (CHDH), and enhancement of signal peaks can also be observed at the two wavelengths, so that analysis and detection of CHDH activity are indirectly realized, and further effective screening of the CHDH inhibitor is realized. The intelligent sensor has the advantages of high accuracy, quick response, high sensitivity, excellent selectivity, low cost and the like, and shows huge application potential in biomedical research and clinical diagnosis.

In this hydrogen peroxide concentration measurement system, a sample water collection tube (3) is branched into a first passage (4) and a second passage (5), and the first passage (4) can be switched between a dissolved oxygen concentration measurement flow passage (7) and a first circulation flow passage (9). The second passage (5) can be switched between a hydrogen peroxide decomposition flow passage (11) and a second circulation flow passage (13). Further, the dissolved oxygen concentration measurement flow path (7) can be switched between the discharge pipe (14) and the second circulation flow path (13). In addition, the hydrogen peroxide decomposition flow path (11) can be switched between the discharge pipe (14) and the first circulation flow path (9). As a result, it is possible to switch between the continuous flow of the sample water (W) from the dissolved oxygen concentration meter (8) to the catalyst resin column (12) or the continuous flow of the sample water (W) from the catalyst resin column (12) to the dissolved oxygen concentration meter (8). As long as the hydrogen peroxide concentration measurement system is adopted, the time until the measured value after the measurement system is switched is stable can be shortened, and the consumption of sample water is low.

The application relates to the field of resource utilization of silicone production hazardous waste. In view of the problems of low resource recovery rate of silicone waste catalyst and slurry residue, secondary pollution and the like in the prior art, the application provides an environmentally-friendly method for resource utilization of silicone waste catalyst and slurry residue. First, the slurry residue is hydrolyzed by concentrated hydrochloric acid to separate filter residue and hydrochloric acid filtrate; the waste catalyst is mixed with the filter residue after slurry inactivation and acid immersion to extract silicon powder; sponge copper is recovered by iron powder replacement, and iron hydroxide is obtained by alkali precipitation, so that efficient recovery of silicon, copper and iron is realized; the silicon powder and the iron hydroxide are used to prepare a magnetic silicon-based catalyst, a Fenton system is constructed by combining the catalyst with hydrogen peroxide to reduce wastewater pollution, zirconium elements are innovatively introduced to enhance the bonding strength of iron and silicon, ZrO2 formed by oxygen-free calcination and ferroferric oxide form a heterojunction, which can accelerate electron transfer, promote hydrogen peroxide decomposition, the catalyst can be recycled multiple times, and the problems of resource waste and secondary pollution are solved.

The utility model relates to a hydrogen peroxide corrosion prevention device for a sensor, and belongs to the technical field of incubators. Comprising a catalyst mounting sleeve, a catalyst module and a sensor, the catalyst mounting sleeve is provided with the catalyst module, and a sealing ring is arranged between the sensor and the catalyst mounting sleeve. A first sealing ring is arranged on the portion, in the catalyst mounting sleeve, of the side edge of the front end of the sensor, so that the incubator forms a sealing structure, hydrogen peroxide enters the catalyst module to be decomposed during free diffusion through one-way air inlet, the catalyst catalyzes decomposition of the hydrogen peroxide, the decomposition effect is good, the performance of the incubator cannot be affected, the structure is simple, disassembly is convenient, and the cost is low. And the cost is low. The utility model aims to provide the hydrogen peroxide corrosion prevention device for the sensor, which does not influence the performance of an incubator and the culture environment, and is simple in structure, easy to disassemble, low in cost and good in hydrogen peroxide decomposition effect.

The application discloses a method for simultaneously degrading organic wastewater and reducing noble metal, and belongs to the technical field of sewage treatment and metal recovery. In view of the deficiency of the traditional technology in the field of simultaneous organic wastewater degradation and noble metal ion reduction, a new laser-driven electrochemical cell is provided. The cell takes titanium as an anode and platinum as a cathode, utilizes the potential difference between the two poles to drive electron migration, realizes electrochemical reduction of silver ions. At the same time, laser irradiation is adopted to excite the anode to form plasma, so that water and hydrogen peroxide are decomposed to generate hydroxyl radicals to efficiently degrade MB. In addition, the laser also has the ability to directly photolyze MB and enhance the electrochemical activity of the cell to synergistically promote the rapid reduction of Ag(I). The application provides an efficient and green new way for organic wastewater treatment and noble metal resource utilization.

A device for recycling sulfuric acid is provided. A container has an inner space. An inlet is located on the first side of the container for introducing a liquid containing sulfuric acid and hydrogen peroxide through a pump. An outlet is located on the second side of the container for exhausting the treated liquid from the container, and the first side and the second side are opposite sides. IR lamp and UV lamp are located in the inner space of the container for making contact with the liquid. IR radiation emitted from the IR lamp and UV radiation emitted from the UV lamp decompose the hydrogen peroxide in the liquid to water and oxygen. The IR radiation heats the liquid to 90° C. to 130° C., and the oxygen is exhausted through the air hole.

The application provides a preparation method of azodicarbonamide, comprising the following steps: S1, uniformly mixing hydrogen peroxide solution with a stabilizer and a cocatalyst to obtain a first reaction solution; S2, mixing biurea, water and a catalyst to obtain a second reaction suspension; S3, dropwise adding the preheated first reaction solution into the second reaction suspension to perform an oxidation reaction, and obtaining azodicarbonamide after the reaction is completed; the stabilizer in the step S1 is one or more of 1,3-diamino-2-hydroxypropane-N,N,N',N'-tetraacetic acid, 8-hydroxyquinoline, sodium dihydrogen pyrophosphate and nitrilotrimethylene phosphoric acid. In the application, the selection of the hydrogen peroxide stabilizer and the cocatalyst can reduce the decomposition speed of hydrogen peroxide and improve the utilization rate of hydrogen peroxide, so that the loss of raw materials is reduced, the cost of raw materials is reduced, and the production profit is improved.

Systems and methods for purifying aqueous solutions include a hydrogen peroxide removal unit including a hydrogen peroxide decomposition media arranged to receive un-treated aqueous solution. The hydrogen peroxide decomposition media includes a platinum group catalyst that includes beads with a density of at least 1 gram / milliliter (g / ml).

The present invention provides a hydrogen peroxide decomposition system that can effectively decompose hydrogen peroxide contained in a liquid to be treated while reducing equipment costs. The hydrogen peroxide decomposition system in the embodiment includes a plurality of hydrogen peroxide decomposition devices 1, 2, and 3, each of which includes a decomposition tank 10 that stores activated carbon 11 for decomposing hydrogen peroxide contained in a liquid to be treated, a storage tank 20 for storing the liquid to be treated that has passed through the activated carbon 11 of the decomposition tank 10, and a circulation feed section 30 that feeds the liquid to be treated stored in the storage tank 20 to the activated carbon 11. In the plurality of hydrogen peroxide decomposition devices 1, 2, and 3, the liquid to be treated in the hydrogen peroxide decomposition device 3 at the final stage is discharged when the hydrogen peroxide concentration of the liquid to be treated in the hydrogen peroxide decomposition device 3 at the final stage is below a target concentration, and the liquid to be treated in each of the hydrogen peroxide decomposition devices 1, 2, other than the final stage, is fed to the hydrogen peroxide decomposition device at the next stage, and the plurality of hydrogen peroxide decomposition devices 1, 2, and 3 are configured so that the liquid to be treated in each of the hydrogen peroxide decomposition devices is circulated below a predetermined temperature.

The invention relates to a hydrogen peroxide sensor (1), comprising a passive measuring sensor (2) and a passive reference sensor (3). These sensors can be brought into contact with a test gas. The measuring sensor (2) is designed to catalytically convert hydrogen peroxide (5), for example by means of a catalytically active layer (8). The measuring sensor (2) is a temperature sensor (6). The measuring sensor (2) can thus detect the heat produced during decomposition of the hydrogen peroxide (5) at the measuring sensor (2).